Computing-scale.



w. o. FARRBLL.

COMPUTING SCALE.

APPLICATION FILED SEPT. 24, 1913.

Patented Mar. 9, 1915.

WILLIAM C. FABRELL, 0F SANJOS, CALIFORNIA;

COMPUTING-SCALE.

Specification of Letters Patent.

Patented'Mar. 9,- 1915# hpplication filed September 24, 1913. 1iSeriaI No. 791,499.

T0 all lwhom it may concern:

Be it known that I, WILLIAM C. FARRELL, a citizen of the United States,residing at San Jose, in the county of Santa Clara' and State ofCalifornia, have invented new and useful Improvements inComputing-Scales, of which the following is a specification.

This invention relates to weighing scales, and particularly to automaticprice computing scales. i

The object of the present invention is to provide a scale in which thereis a revoluble disk bearing weight indicatinggraduations and pricecomputations at difierent rates per pound, the rotary dial beingconnected to an arbor of the scale.

A further object of the invention is to provide an improved computingscale in which the weight of the article and the price at differentrates per pound can be readilyk observed by the merchant and thecustomer; the rotary dial being movable with relation to a fixed rateindicator or scale in front of the dial.A

The invention consists in combination with the spindle or arbor of aweighing' ing pounds and fractions of pounds, andother graduationsrepresenting the price of goods at different rates, the price scale.having a fixed correlation with the weight scale so that when goods aresold at' a predetermined rate per pound and the arbor swings the dial toindicate the weight, the registration with a hair line on the rateindicating scaleof a mark on the dial will instantly indicate thecorrect weight and price.

The invention further consists of the parts and the construction andcombination of parts as hereinafter more fully described and claimed,having reference to the accompanying drawings, in which,

Figure 1 is a front elevation of the improved scale partly brokeny away,to show the dia1.` JF ig. 2 is a sectional View of the scale.

In the drawings A represents a weighing scale, which is shown asprovided with thev usual tray 2 and spring rod 3; this entering thecasing 4 and operating'an arbor 5 when material to be weighed is placedupon the tray 2.

My present invention comprehends the lprovision of a fixed rate scale 6,which may be suitably produced upon a front 7, which may be of glass orother material, preferably a small segmental portion 8 being "made of-glass or` other transparent material through which may be seen arevoluble dial 9, secured upon the arbor 5 of the scale. Upon the dial9`and adjacent to its periphery is produced a weight -scale indicated bythe graduations 10, the scale being divided into fractions representingpounds, and indicated as by the numeral 11, the pound divisions of thedial being subdivided into divisions representing .ounces or otherunits, as at 12. l

Concentrically arran ed'upon the face of the dial 9 are other ra uatedscale rings 13, with divisions 14. he divisions 14 of each of the scalerings 13 are souproportioned that they will coincide with the respectiveradiall pound marks 11 on the weight' scale 10, and at each division 14will be placed a multiple indicating the price of the correspondingnumber of pounds at a given rate, and each scale ring 13 is againsubdivided into fractionswhich have a relative value 1n proportion tothe fractional weight indicated between the pound graduations and thepound prices; the divisions 14 of the rings 13 each indicatingprogressively from zero of weight and price measure the cost of anarticle at a predetermined rate, which is found at the rate scale 6 onthe face 7.

The rate scale 6 is provided with suitable lines and rate indications,the ends of the rate lines 6 intersecting with their respectiveconcentric price scale lines 13 on the dial 9. Thus in the positionshown in Fig. 1, when material has been placed upon the tray 2 of thescale, weighing for example two pounds and two ounces, the two pound,two ,ounce mark 12 will come into juxtaposition with a hair or'readingline 16, preferably arranged in the plane of the lower vertical radiusfrom the center of the arbor 5, and when the weight is so indicated theoperator will thenl observe the price mark indicated at 17 according tothe rate per pound at which the goods is being sold, the operatorfollowing from the rate scale 6 around its intersecting price circle 13to the point of conjunction between that particularprice circle and thereading line 16; whereuponthe correct price at the given rate of theindicated weight of the goods will be found. In this instance, theexample given shows goods selling at the rate of eight cents per pound,weighing two pounds two ounces, the selling price being seventeen cents.

It is understood' that since the rate scale (S is provided with figuresat 15, indicating different rates, the price circles v13will be divided'intov divisionswhich will indicate accuratelythe price of the goods perpound and fractions of a pound according to the given rate, so that thesalesman and the ,customer may readily ascertain the price withoutcomputation, by figuring from the rate per pound indication around itsintersecting price circle 13 tothe price indicated at the,

ranged on the front face of thecasing adjacent to but beyond one of thesides of said segmental opening, a dial actuated by the tray member ofthe scale, said dial having a circular weight scale at thecircumferential portion thereof, and a series of price scale ringsbetween -the center of the dial and the weight scale which price scalerings register with the respective divisions of the fixed rate scale,said hair-like reading line by reason.

of centrally bisecting the segmental opening enabling the scales on thedial to be read for equal distances on each side of the said readingline, all of the scales being in registry and readable circularly of thefront face of the casing.

In testimony whereof I have hereunto set my hand in the presence of twosubscribin witnesses.

WILLIAM C. FARRELL. Witnesses:

FLORENCE MoTscH, ALBERTG. Mo'rsoH.

